Fix close callback getting called recursively when application gets closed by user. The initial call originated from 'Form::WmClose', second call from 'Form::CheckCloseDialog'. The original call should set the 'called' flag, but never did.
* Finished designer code for launcher gui.
* Basic implementation of setting flags for host launch option.
* Check in 'CHostState::LoadConfig' if -launcher is below 1.. if condition is met the cfg's will be executed from 'CHostState::LoadConfig'.
* Added 'StringIsDigit' utility.
cppkore uses string/wstring as StringBase while we use std::string/std::wstring as string/wstring. Changed all types in cppkore to String/WString instead.